python实现rsa的公钥加密、私钥解密及私钥加密、公钥解密

rsa包中现成的公钥加密、私钥解密代码

import rsa
def rsa_encrypt(d_str):
    # 生成公钥和私钥
    pubkey, privkey = rsa.newkeys(1024)
    # 将字符串进行编码
    content = d_str.encode('utf-8')
    # 公钥加密
    crypto = rsa.encrypt(content, pubkey)
    print ('加密后', crypto)
    return crypto, privkey

def rsa_decrypt(crypto, privkey):
    # 解密
    content = rsa.decrypt(crypto, privkey)
    # 解码
    content = content.decode('utf-8')
    print ('解密结果', content)
if __name__ == '__main__':
    a = rsa_encrypt('hello word')
    rsa_decrypt(*a)

但没有现成的私钥加密、公钥解密的实现

通过阅读源码，整理出一份简易的实现方式

import rsa
from rsa import common, transform, core
import os


def _pad_for_encryption(message, target_length):

    max_msglength = target_length - 11
    msglength = len(message)

    if msglength > max_msglength: